■ Both thrilling and devastating, the remarkable new documentary "Kurt Cobain: Montage of Heck" explores the indelible life and legacy of the Nirvana rocker. Director Brett Morgen gained unprecedented access to Cobain's personal archives and relies on that material to offer an unflinchingly intimate portrait of an iconic musician who lived on the fine edge between madness and genius. Included: interviews with Cobain's mother, sister and widow Courtney Love. 9 p.m. Monday, HBO.

■ "Madam Secretary" wraps up a successful first season with a case of the flashbacks. The political drama recalls how Elizabeth (Tea Leoni) received a job offer that would have changed the course of her life. 8 p.m., CBS.

■ Have you stuck with "Secrets & Lies" for all 10 episodes? Your reward comes here when the murderer is revealed, and Det. Cornell (Juliette Lewis) prepares to make an arrest. 9 p.m., ABC.

■ The oh-so-creepy supernatural Victorian-era drama, "Penny Dreadful" returns for a second season of ghastly shenanigans. Keep the lights on. 10 p.m., Showtime.

MONDAY

■ "Gotham" closes out a first season that was both riveting and revolting as the city was plagued by a vicious gang war. Too bad Batman couldn't show up to save the day. 8 p.m., Fox.

■ On "The Returned," Peter (Jeremy Sisto) has a starling announcement. Then again, what could be more startling than a bunch of dead people coming back to life? 10 p.m.

TUESDAY

In the Season 1 finale of "Forever," a museum worker's death prompts an investigation that hinges on a missing dagger that was used to kill Julius Caesar — and Adam. 10 p.m., ABC.

WEDNESDAY

■ "American Idol" gets down to its final three contestants tonight. Too bad none of them is named Kelly Clarkson or Carrie Underwood. 8 p.m., Fox.

■ On the season finale of "Criminal Minds," Kate's (Jennifer Love Hewitt) niece and her best friend are kidnapped. The suspect? An online predator who poses as a teen boy. 9 p.m., CBS.

■ On "Bones," a high school student's remains are found in a ditch and Brennan (Emily Deschanel) finds similarities between her own teen years and the victim's. 8 p.m., Fox.

FRIDAY

"Hawaii Five-0" says "aloha" to its fifth season with back-to-back episodes that feature the murder of a bounty hunter and a clash with a fanatical patriot out to start a new war on terror. 9 p.m., CBS.

SATURDAY

Reese Witherspoon returns to "Saturday Night Live" for her second hosting gig. The musical guest is Florence + the Machine. 11:29 p.m., NBC.